I need some help on sewing a sweater knit fabric. It has a medium drape to it.
I want a long sleeve unfitted t-shirt type top.
I did look through my books on sewing knits, but can't find exactly what I am looking for. I think my problem is that I don't have any matching ribbing to use to finish the neck edge.
I really wish you could buy ribbing to match the knits.
I will try and figure out how to get a picture added so you can see the fabric.

I recently had success using my 4-thread serger to sew the seams & my coverstitch for the hems. I used wooly nylon thread in the loopers. An option for neck edges is using foldover elastic. Sewzannes has a lot of colors to choose from. Mine was actually a hoody, which is my way of cheating on the neckline.

Hmm. I don't know if this would work on a sweater knit, you may have to do some testing to see... I have had same thoughts about matching ribbing, sweater or other knits. But Threads had done an article a while ago in which "ribbing" was created from fleece using a twin needle, essentially it allowed the fabric to "tunnel" as you might in creating pintucks - and continuous "tucks" created what looked just like self fabric ribbing!

How do you finish V or round necklines in sweater knits so they are flat like RTW? The videos here don't address heavier knits, self-binding them can be thick. Anyone have success is re-purposing pullovers into cardigans?

The best v-neck method to use is the crossover V-neck, the ribbing laps over at the center front. I learned it from stretch and sew, I have an old book of theirs about sewing sweater knits.
I usually felt my old sweaters and make crafts, such as bags, and I made a dog coat. I bound the edges with foldover elastic and it came out really nice. photo of coat
I bought an XL mens cashmere sweater and lightly felted it. It was still too big, so I took in the shoulder seams and the side seams. I just used my sewing machine. The felting keeps the knit from raveling.
I also made my daughter a cardigan out of a long sleeved t shirt of mine, I cut down the cf, ironed a strip of tricot interfacing along the cut edge. I folded it under, sewed and added plastic snaps. She wears it over a tank top to make a sweater set.

------My grandmother taught me to sew when I was 10, and I've been sewing ever since.

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